Open AccessJournal Article
Experimental investigation of ultrashort pulse laser-induced breakdown thresholds in aqueous media
Daniel X. Hammer,Robert J. Thomas,Gary D. Noojin,Benjamin A. Rockwell,Paul K. Kennedy,William P. Roach +5 more
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In this paper, the dependence of LIE irradiance thresholds on pulse duration, optical wavelength, and focal volume was examined, and the experimental data obtained is compared with a theoretical model.Abstract:
Laser-induced breakdown (LIE) thresholds are determined for pulse durations of 2.4 ps, 400 fs, and 100 fs at 580 mn in high purity water, saline and tap water. The dependence of LIE irradiance thresholds on pulse duration, optical wavelength, and focal volume is examined, and the experimental data obtained is compared with a theoretical model. The slopes of the probability curves calculated are compared with mechanisms for LIE, namely avalanche ionization, multiphoton initiated avalanche ionization, and multiphoton ionization. Lastly, the dependence of the peak breakdown electric field on pulse duration and focal volume is empirically determined and compared with previous work.read more
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Recent developments in compact ultrafast lasers
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Mechanisms of femtosecond laser nanosurgery of cells and tissues
TL;DR: In this article, the working mechanisms of femtosecond laser nanoprocessing in biomaterials with oscillator pulses of 80-MHz repetition rate and with amplified pulses of 1-kHz repetition rate were investigated.
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Fundamentals and Applications of Laser-Induced Breakdown Spectroscopy
TL;DR: In this paper, the authors reviewed the literature on laser-induced breakdown spectroscopy by dividing the literature into three categories according to target phase: solid, liquid, or gas.
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Corneal refractive surgery with femtosecond lasers
TL;DR: It is concluded that femtosecond laser technology may be able to perform a variety of corneal refractive procedures with high precision, offering advantages over current mechanical and laser devices and techniques.
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Laser-induced breakdown in aqueous media
TL;DR: In this paper, the effects of laser-induced breakdown in aqueous media were investigated and applications of laser induced breakdown in liquids in liquids were discussed. But none of these applications were considered in this paper.
References
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Journal ArticleDOI
Laser-induced electric breakdown in solids
TL;DR: In this article, a review of recent experimental results on laser-induced electric breakdown in transparent optical solid materials is given, where a fundamental breakdown threshold exists characteristic for each material, which is determined by the same physical process as dc breakdown, namely, avalanche ionization.
Journal ArticleDOI
Acoustic transient generation by laser‐produced cavitation bubbles near solid boundaries
Alfred Vogel,Werner Lauterborn +1 more
TL;DR: In this article, the authors investigated the acoustic transients emitted after breakdown and cavitation bubble collapse upon focusing a Q-switch laser pulse into a liquid with special emphasis on their modifications induced by a solid boundary.
Journal ArticleDOI
A first-order model for computation of laser-induced breakdown thresholds in ocular and aqueous media. I. Theory
TL;DR: In this paper, an analytic, first-order model was developed to calculate irradiance thresholds for laser-induced breakdown in condensed media, including ocular and aqueous media.
Journal ArticleDOI
Choice of clip levels for beam width measurements using knife-edge techniques
TL;DR: In this article, the scanning knife-edge technique was used to measure the width of an optical beam having an arbitrary or irregular transverse profile, and the clip level and scale factor for converting the measured clip width into an effective width of the laser beam was selected.
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